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See Chinese contents: GB/T 32661-2016 GB/T 32661-2016: Spherical silica powder
This Standard specifies the terms and definitions, classification and labeling, requirements, test methods, inspection rules, marking, packaging, transportation and storage of spherical silica powder. This Standard is applicable to spherical silica powder used in electronic packaging materials fillers, copper-clad laminate fillers, etc. in the electronics and electrical appliance industries. Spherical silica powder used for other purposes may refer to this Standard.
